A373420 - cp's OEIS frontend

A373420 Number of Carlitz compositions of n (see A003242) such that the first and last parts are equal.

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	3
6	2
7	7
8	11
9	17
10	26
11	54
12	86
13	155
14	272
15	464
16	816
17	1447
18	2507
19	4400
20	7706
21	13456
22	23570
23	41293
24	72212
25	126394
26	221282
27	387219
28	677714
29	1186311
30	2076170
31	3633761
32	6360219
33	11131698
34	19483066
35	34100455
36	59683664
37	104460655
38	182832044
39	319999739

[1, 1, 1, 1, 2, 3, 2, 7, 11, 17, 26, 54, 86, 155, 272, 464, 816, 1447, 2507, 4400, 7706, 13456, 23570, 41293, 72212, 126394, 221282, 387219, 677714, 1186311, 2076170, 3633761, 6360219, 11131698, 19483066, 34100455, 59683664, 104460655, 182832044, 319999739]

cp's OEIS Frontend

A373420 Number of Carlitz compositions of n (see A003242) such that the first and last parts are equal.

Table of values

List of values